Valve mechanism



No. 752,400. PATENTED FEB. 10, 1904.

a. KROMER. VALVE MECHANISM.

APPLICATION FILED MAR. 16. 1903.

NO. MODEL. 2 SHEETS-SHEET 1.

WITNESSES: v INVENTOR ATTORNEY mg mama PmRs cu. excruumo. wgsuma'iou1:.(1

No. 752,400.- I 'PATBNTED FEB. 16, 1904. E KROMER. VALVE MECHANISM.

APPLIOATIOK FILED MAR. 16. 1903.

2 SHEETS-SHEET 2 NO MODEL.

WITNESSES: INVENTOR I 7 2m /mm/ I I BY ATTORNEY.

THE cams wsrzns co. womm'wmwnsmuumu, o c

i that indicated in Fig. 1.

UNITED STATES Patented February 16, 1904.

PATENT OFFICE.

VALVE MECHANISM.

SPECIFICATION forming part of Letters Patent No. 752,400, dated February16, 1904.

7 Application filed March 16, 1903.

To all whom it may concern:

Be it known that I, EMANUEL KRoMnR, acitizen of the United States,residing at Newark, in the county of Licking and State of Ohio, haveinvented a certain new and useful Improvement in Valve Mechanism, ofwhich the following is a specification.

My invention relates to the improvement of valve mechanism forsteam-engine cylinders; and the objects of my invention are to providean improved valve mechanism of this class of superior construction andarrangement of parts, to provide improved means whereby a reversal inthe running of the engine may be attained by the sliding of thevalveseat, and to produce other improvements, the details of which willbe more fully pointed out hereinafter. These objectsl accomplish in themanner illustrated in the accompanying drawings, in which Figure 1 is avertical longitudinal sectionv through a steam-chest and a portionof thesteam-cylinder with which said steam-chest is connected. Fig. 2 is asimilar view showing the position of the valve-when the piston is beingdriven in the opposite direction from Fig. 3 is a similar sectional viewshowing the position of the valve-seat when the latter is thrown to thereverse position, and Fig. 4 is a transverse section on line at w ofFig. 1.

Similar numerals refer to similar parts throughout the several views.

1 represents a steam-cylinder, and 2 a steamchest, which is suitablyconnected with said cylinder in any desired manner. In the wall orpartition 2*, which separates the steam chest and cylinder, I form acentral exhaust-port 3 and on opposite sides of the latter ports 4 and5, the latter communicating with passages 6 and 7, which lead toopposite ends of the cylinder 1. Supported in contact with the partitionor wall 2 is a sliding valve-seat 8, the latter being in the nature ofan oblong plate which has formed transversely therein a central port 9and on opposite sides of the latter pairs of separated ports, as 10 and11 and 13 and 14. vAbove and upon the movable valve-seat 8 is supporteda sliding valve-plate 15, the latter having formed therein separated inthe usual manner with the eccentric.

Serial No. 147,934. (No model.)

ports 16, 17, 18, and 19. Rising from the opposite edges of the valveplate 15 are the sidewalls of a cap 20, the latter having outturnedbase-flanges 21, through which pass loosely vertically-mounted bolts 22,the lower threaded ends of which are secured in threaded sockets of thevalve-seat 8. Between the cap base-flanges 21 and the upper enlargedends or heads of the bolts 22 are interposed springs 23. The side wallsof the cap 20 are connected in their lower portions by transversecross-bars 20?, between which and the valve-seat the valve 15 is adaptedto slide.

24 represents the steam-inlet for the chest 2. Connected with theslide-valve 15 is the usual valve-rod 25,which leads through a boxing atone end of the steam-chest and connects WVith one end of the slidingvalve-seat is also connected an outwardly-extending slidingoperating-rod 26, with which may be connected an operating-lever orother suitable means for moving the same longitudinally when desired forthe purpose hereinafter described.

In Fig. 1 of the drawings I have shown the movable valve-seat and theslide-valve in such positions with reference to each other and to theports 4 and 5 as to insure the admission of steam from the steam-chestto the end of the steam-cylinder at the right through the medium of theconnected ports 19, 14, and 5 and the exhaust of the steam in front ofthe piston through the connected ports 4, 11, 17, and 18.

In Fig. 2 of the drawings I have shown the position of the parts whenthe outward movement of. the valve-rod 25 has resulted in acorresponding sliding movement of the valve 15. In this position, aswill be seen in Fig. 2, the ports 16, 10, and a will be brought intocommunication, the port 14 closed, and the ports 18 and 13 brought intocommunication with the passage 5, with the result that the live steamwill be directed through the ports 16, 10, and 4 to the end of thecylinder at the left and the piston, which is indicated at 27, driven tothe right. The steam in front of said piston when the parts are in thelast described position will exhaust through'the passage 5, ports 13 and18, and exhaust-ports 17.

For the purpose of describing the means and operation of reversing themotion of the engine we will assume that the parts are in the positionindicated in Fig. 1 of the drawing and that the piston 27 has been movedto the left to a position substantially that shown in Fig. 3. A movementof the valve-seat-opparts being in this position, it is obvious that thelive steam may pass from the steam-chest through the ports 16, 10, and 4and passage 6, resulting in the piston 27 traveling back to its positionat the right of the cylinder 1 and in the steam exhausting through theports 5, 13, and 18 to the exhaust-ports 9 and 3. At the next movementof the slide-valve in the opposite direction, which occurs as the pistonreaches the end of the cylinder to the right, the piston will be givenits full stroke to the left and the reciprocating motion thereof thuscontinued, with the result that the motion of the engine is changed orreversed.

' From the construction and operation described it will be seen thatinstead of employing the usual link-motion or other mechanism to impartthrough the slide-valve a reversal of the engine this reversal isattained by the employment of a suitably operated sliding valve-seat.

It will be understood that the pressure of the steam within thesteam-chest in conjunction with the tension of the springs 23 will serveto hold the cap 20 in proper frictional contact with the valve 15 andtohold the latter in desirable contact with the sliding valveseat 8.

Having now fully described my invention, what I claim, and desire tosecure by Letters Patent, is v 1. In a valve mechanism forengine-cylinders, the combination with a steam-cylinder and steam-chest,the wall between said cylinvalve-seat and the ports and passages of saidwall to alternately permit the passage of steam to opposite ends of saidcylinder, substantially as specified.

2. In a valve mechanism for steam-cylinders, the combination with asteam cylinder and steam-chest, the wall between the same having anexhaust-port and passages 6 and 7 on opposite sides thereof leading toopposite ends of the cylinder, said passages having enlarged mouthportions, of a sliding valve having port 17 and a comparatively smallport on each side thereof and a slidable valve-seat having a port 9. andpairsof ports on opposite sides thereof adapted to communicatesimultaneously with the enlarged mouths of the passages 6 and 7substantially as specified.

3. In a valve mechanism for engine-cylinders, the combination with asteam-cylinder and steam-chest, the wall between said cylinder and chesthaving passages leading to opposite ends ofthe cylinder andcommunicating with the steam-chest, of a valve seat mounted to slideagainst said wall, and having a plurality of ports as described, asliding valve on said valve-seat having a plurality of ports asdescribed, and a cap-body 20 connected with and rising from the saidvalveseat and springs adapted to exert a downward pressure on said capand hold the sliding valve in contact with V the sliding valve-seat whenthe parts are not subjected to steam-pressure, substantially asspecified.

EMANUEL KROMER. In presence of F. L. WOODBRIDGE, ALVAH D. HAYES.

